What best describes homeostasis?

What best describes homeostasis?

A - Attempting to reach the target level
B - Correcting for feedback errors
C - Maintenance of external conditions
D - Amplification away from the target cell
E - Maintenance of internal conditions


Answer: E - Maintenance of internal conditions

Why is negative feedback not a negative process?

Why is negative feedback not a negative process?

A - It allows for quick, amplified responses
B - It attempts to maintain an internal environment different from the external environment
C - It attempts to maintain an internal environment similar to the external environment
D - It causes fruit to ripen
E - It allows for ecotherms to increase heir body temperature


Answer: B - It attempts to maintain an internal environment different from the external environment

What is the term for an error in a feedback system?

What is the term for an error in a feedback system?

A - Glucagon
B - Alteration
C - Alternative
D - Homeostasis
E - Alliteration


Answer: B - Alteration

Which hormone is responsible for signaling the storage of blood glucose?

Which hormone is responsible for signaling the storage of blood glucose?

A - Pancrean
B - Glucagon
C - Glycogen
D - Insulin
E - Glucose

Answer: D - Insulin

During birth, pressure from a baby's head triggers contraction, which push the baby creating more pressure, which triggers more contractions. This is an example of which type of feedback?

During birth, pressure from a baby's head triggers contraction, which push the baby creating more pressure, which triggers more contractions. This is an example of which type of feedback?

A - Homeostatic
B - Alternation
C - Positive
D - Cumulative
E - Negative


Answer: C - Positive

What best describes homeostasis?

What best describes homeostasis?

A - Maintaining external conditions that affect internal conditions
B - Changing internal conditions so that they match external conditions
C - Blocking molecules from being transported into or out of the cell
D - Facilitating diffusion through transport proteins
E - Maintaining constant, stable internal conditions


Answer: E - Maintaining constant, stable internal conditions

What is an important reason that cells need to maintain homeostasis?

What is an important reason that cells need to maintain homeostasis?

A - Sugar balance
B - Protein synthesis
C - All are correct
D - Metabolism
E - Waste removal


Answer: C - All are correct

What is the barrier that protects a cell from its external environment?

What is the barrier that protects a cell from its external environment?

A - Cytoplasm
B - Channel protein
C - transport protein
D - ATP
E - Plasma membrane


Answer: E - Plasma membrane

What do endotherms do?

What do endotherms do?

A - None are correct
B - Conform to their external environments
C - Regulate their body temperature through photosynthesis
D - Make their own food from sunlight
E - Regulate their body temperature through metabolism


Answer: E - Regulate their body temperature through metabolism

What is diffusion?

What is diffusion?

A - Movement of molecules from an area of low concentration to an area of high concentration
B - Moving molecules from inside the cell to the outside of the cell
C - Actively moving molecules down the concentration gradient
D - Maintaining a stable, internal environment
E - Movement of molecules from an area of high concentration to an area of low concentration


Answer: E - Movement of molecules from an area of high concentration to an area of low concentration

Why is photosynthesis an important process?

Why is photosynthesis an important process?

A - It provides energy for almost all living things
B - It converts chemical energy into sunlight
C - It recycles nutrients back into the ground
D - It allows heterotrophs to "make" their own food
E - It puts nitrogen into the atmosphere


Answer: A - It provides energy for almost all living things

Which is true about free energy and matter?

Which is true about free energy and matter?

A - They need to be recycled through the Earth
B - All are correct
C - They are required by all living things
D - They affect all tropic levels
E - They get stored in our bodies temporarily


Answer: B - All are correct

What is likely the most important factor for life on Earth?

What is likely the most important factor for life on Earth?

A - Phosphorous
B - Sunlight
C - Nitrogen
D - Carbon
E - Plants


Answer: B - Sunlight

What important thing do autotrophs do?

What important thing do autotrophs do?

A - Produce sunlight
B - Make their own food
C - Produce DNA
D - Eat other organisms
E - Hibernate during winter


Answer: B - Make their own food

What best describes photosynthesis?

What best describes photosynthesis?

A - None are correct
B - Conversion of chemical energy to sunlight
C - Conversion of sunlight to sunlight energy
D - Conversion of carbohydrates to ATP
E - Conversion of sunlight to chemical energy


Answer: E - Conversion of sunlight to chemical energy